A:
Positive:
1 x 4020252117 x 5743217323 x 17479357161 x 2497051911 x 4413012741 x 1466716377 x 6304319187 x 20953
Negative:
-1 x -402025211-7 x -57432173-23 x -17479357-161 x -2497051-911 x -441301-2741 x -146671-6377 x -63043-19187 x -20953
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 402,025,211, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 402,025,211 | |
| -1 | -402,025,211 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 402,025,211.
Example:
1 x 402,025,211 = 402,025,211
and
-1 x -402,025,211 = 402,025,211
Notice both answers equal 402,025,211
With that explanation out of the way, let's continue. Next, we take the number 402,025,211 and divide it by 2:
402,025,211 ÷ 2 = 201,012,605.5
If the quotient is a whole number, then 2 and 201,012,605.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 402,025,211 | |
| -1 | -402,025,211 |
Now, we try dividing 402,025,211 by 3:
402,025,211 ÷ 3 = 134,008,403.6667
If the quotient is a whole number, then 3 and 134,008,403.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 402,025,211 | |
| -1 | -402,025,211 |
Let's try dividing by 4:
402,025,211 ÷ 4 = 100,506,302.75
If the quotient is a whole number, then 4 and 100,506,302.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 402,025,211 | |
| -1 | 402,025,211 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 161 | 911 | 2,741 | 6,377 | 19,187 | 20,953 | 63,043 | 146,671 | 441,301 | 2,497,051 | 17,479,357 | 57,432,173 | 402,025,211 |
| -1 | -7 | -23 | -161 | -911 | -2,741 | -6,377 | -19,187 | -20,953 | -63,043 | -146,671 | -441,301 | -2,497,051 | -17,479,357 | -57,432,173 | -402,025,211 |
Here are some more numbers to try:
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